lsustang04

Domac catted h pipes need 02 extensions for both 03 and 04 mustang gt models? Or just the 04s? Stang Mods.com says that 03-04 models need them, but when you click the o2 extensions it says it's only a must for 04s. Do the 03 gts need the extensions as well?

sprostang

Yes, get them. Your right, 04`s are supposed to be the ones that need them but I know some people that have needed them on 03`s as well.

lsustang04

How come the 99-02s don't need them?

sprostang

There is a slight difference in the midpipes. It all basically has to do where the rear 02 sensors are located on the midpipe.

lsustang04

So since you have an 04 stang did you have to get them?

sprostang

Yeah, I needed them.

lsustang04

I hear the h midpipes are a blank to change. Did you change yours or did you get a shop to do it? How much is labor for installation?

sprostang

They aren`t that hard to do. Just the bolts on the passenger side manifold can be a bitch to get off though. I had a shop do mine for $70

lsustang04

Man, that's pretty cheap. Several performance shops have quoted melike 100-120 for the job. Did you get like a midas or meinke type of repair shop to do it?

sprostang

I had a performance shop do it. It took them less than an hour. Don`t even think about asking a muffler shop. They won`t do it. Reason why is because it`s illegal to remove properly working cats even if you replace them with others and they claim that they will get fined if caught.. Yeah, is sounds stupid but thats just the way it is.